#include <iostream>

struct Sales_data {
  std::string bookNo;
  unsigned unit_solds = 0;
  double revenue = 0.0;
};

int main() {
  Sales_data item;
  std::cout << "Please input the bookNo, unit_solds, revenue" << std::endl;
  std::cin >> item.bookNo >> item.unit_solds >> item.revenue;
  std::cout << item.bookNo << std::endl;
  return 0;
}